package com.itheima.reggie.controller;

import cn.hutool.core.io.IoUtil;
import com.baomidou.mybatisplus.annotation.Version;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;
    @PostMapping("/upload")
    public R upload(@RequestBody MultipartFile file) throws IOException {
        log.info(file.toString());

        //原始文件名
        String originalFilename = file.getOriginalFilename();
        String s = originalFilename.substring(originalFilename.lastIndexOf("."));
        //创建随机文件名称防止文件覆盖
        String fileName = UUID.randomUUID().toString() + s;
        //创建一个目录对象
        File dir = new File(basePath);
        if(!dir.exists()){
            //创建目录
            dir.mkdir();
        }
        //将临时文件转存到指定位置
        file.transferTo(new File(basePath+fileName));
        return R.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws IOException {
        try {


            //输入流，读取文件内容
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));

            ServletOutputStream fileoutputStream = response.getOutputStream();
            response.setContentType("image/jpeg");

            /*int len = 0;
            byte[] bytes = new byte[1024];
            while ((len=fileInputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }*/
            IoUtil.copy(fileInputStream,fileoutputStream);
            fileoutputStream.close();
            fileInputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}
